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boss_dr12 module
Compute the likelihood of the supplied expansion and growth history against BOSS DR12 data
Name: boss_dr12
File: cosmosis-standard-library/likelihood/boss_dr12/boss_dr12.py
Version: 1607.03155v1
Author(s):
URL: https://www.sdss3.org/science/boss_publications.php
Cite:
Rules:
Assumptions:
-
Explanation
This module gives a likelihood of the comoving angular diameter distance D_m, the Hubble parameter H(z) and f*sigma_8. It uses the sound horizon at last-scatter rs_zdrag.
A correlated Gaussian likelihood is then returned.
##Parameters
These parameters can be set in the module's section in the ini parameter file.
If no default is specified then the parameter is required.
| Parameter | Description |
|---|---|
| data_file | string, path to file with measured D_m(z1),H(z1),fsig8(z1),D_m(z2),etc values in (default: included file) |
| cov_file | string, path to covariance matrix file (default: included file) |
| rs_fiducial | Real, Fiducial value of sound horizon at last scattering used in making data (default=148.6) |
| verbose | Bool, Print extra output (default = False) |
| mode | 0 for BAO only, 1 for BAO+FS measurements |
##Inputs
These parameters and data are inputs to the module, either supplied as parameters by the sampler or computed by some previous module. They are loaded from the data block.
| Section | Parameter | Description |
|---|---|---|
| growth_parameters | d_z | 1D real array, linear growth factor D |
| f_z | 1D real array, linear growth rate f | |
| z | 1D real array, redshift of samples | |
| cosmological_parameters | omega_m | real, baryon + cdm density fraction today |
| sigma_8 | real, amplitude of linear matter power at 8/h Mpc at z=0 | |
| h0 | real, hubble parameter H0/(100 km/s/Mpc) | |
| distances | z | 1D real array, redshifts of samples |
| d_a | 1D real array, angular diameter distance in Mpc | |
| h | 1D real array, hubble parameter with in units of Mpc |
##Outputs
These parameters and data are computed as outputs from the module
| Section | Parameter | Description |
|---|---|---|
| likelihoods | boss_dr12_like | real, likelihood of supplied expansion history |
Updated